Two Speedway gas stations are located within 1/10th of a mile of each other on Ky. 18, Florence. One is at the corner of Ky. 18 and Merchants Street; the other at Ky. 18 and Ridge Road.

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Gas prices have long been higher in Northern Kentucky than across the river in Southwest Ohio, partly because of cleaner-burning gasoline required by the state in Boone, Kenton and Campbell counties to fight air pollution.

Lately, that gap has gotten bigger, with spreads as much as 10-12 cents on any given day, leading some people to wonder if Speedway's increased share of the market might be responsible.

But industry experts say that rise has nothing to do with Speedway's purchase and conversion of nine area convenience stores last year that pushed another national brand almost out of the ...